We used to have reasonablish ADSL2+ speeds (for a longer copper line) that let us stream Netflix in 1080p well enough:
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But over the past week, it's dropped back to ADSL_G and refuses to sync at anything higher than the below (which is noticeably worse, considering the speeds we're talking about):
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I've contacted BigPipe who have apparently logged a fault with chorus, but I'm curious in the meantime if anybody has any other insight to offer...

P.S. No we can't get (non-RBI) wireless broadband.